Hello,

I'm looking to create a customisable template in word, and I'm not sure if it's possible. This is what I would like to be able to do:

1) A word document that when you open, has a checklist of criteria.
2) This checklist can be ticked or unticked depending on what content you need to template to contain.
3) Once you have selected the criteria you need, you can click create and the template will include the information that you need.

For example: A template document that contains information regarding Heart Disease. This template contains ALL information relating to heart disease, but if I wanted to be able to customise this to a particular client, who wouldn't need all of the information, and can quickly (checklist) select what I would like to include based on the client's needs. So if my client was 15, overweight, and had a genetic risk, I could include this information, but exclude information about heart disease in old age, heart disease and diabetes, heart disease and fitness etc.

I'm sure something like this already exists, but I can't seem to find what I'm looking for anywhere. If somebody could point me in the right direction, that would be great.

This is something you will need to design. You can do this most elegantly with a User Form.
Create a Simple Userform
Create & Employ a Userform

See also http://word.mvps.org/FAQs/MacrosVBA/index.htm for information on various methods within vba.

You can store the text you want using AutoText rather than incorporating it directly into the userform. IMO, it is easier to handle formatting this way. That is, you use the userform to insert AutoText which is already formatted rather than inserting the text as strings in vba and formatting it.
Automated Boilerplate Using Microsoft Word

Here is more general information about creating templates. These do not directly address your question, though.
Templates in Microsoft Word
How to Create a Template